The present work reports on the novel implementation of a miniaturized receiver for underwater networking merging a Piezoelectric Micromachined Ultrasonic Transducer (PMUT) array and signal conditioning circuitry in a single, packaged device. Tests in both a large water tank and a pool demonstrated that the system can attain large enough Signal-to-Noise Ratio (SNR) for communication at distances beyond two meters. An actual communication test, implementing an Orthogonal Frequency Division Multiplexing (OFDM) scheme, was used to characterize the performance of the link in terms of Bit Error Rate (BER) vs SNR. In comparison to previous work demonstrating high-data rate communication for intra-body links and acoustic duplexing, this implementation allows for significantly larger distances of transmission, while addressing the signal conditioning and submersible packaging needs for underwater conditions, thus enabling PMUT arrays for operating as complete underwater communication receivers. [2020-0185]

中文翻译：

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用于水下声学网络的小型化基于 PMUT 的接收器

目前的工作报告了一种用于水下联网的小型化接收器的新颖实现，该接收器将压电微机械超声换能器 (PMUT) 阵列和信号调节电路合并到单个封装设备中。在大型水箱和水池中进行的测试表明，该系统可以获得足够大的信噪比 (SNR)，以便在两米以外的距离进行通信。实施正交频分复用 (OFDM) 方案的实际通信测试用于根据误码率 (BER) 与 SNR 来表征链路的性能。与之前展示体内链接和声学双工的高数据速率通信的工作相比，这种实现允许显着更大的传输距离，同时解决水下条件下的信号调节和潜水封装需求，从而使 PMUT 阵列能够作为完整的水下通信接收器运行。[2020-0185]